Oregon voters will decide Tuesday whether to tax insurance companies and some hospitals to help pay for healthcare for low-income residents.

As of Monday, only 28.3 percent of ballots had been returned, the Oregon Secretary of State reported. Only 24.9 percent of Marion County voters, and 27.9 percent of Polk County voters, had returned their ballots.

Voter turnout for the last special election, in 2010, was 62.7 percent.